﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.IO.IsolatedStorage;

namespace UI
{
    public partial class App : Application
    {
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                //Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are handed off to GPU with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;

                // Disable the application idle detection by setting the UserIdleDetectionMode property of the
                // application's PhoneApplicationService object to Disabled.
                // Caution:- Use this under debug mode only. Application that disables user idle detection will continue to run
                // and consume battery power when the user is not using the phone.
                PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled;
            }

        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
            if (IsolatedStorageSettings.ApplicationSettings.Contains(ConfigHelper.IsValidSettingsString) == false)
            {
                IsolatedStorageSettings.ApplicationSettings[ConfigHelper.AccessTokenString] = string.Empty;
                IsolatedStorageSettings.ApplicationSettings[ConfigHelper.AccessTokenExpiredTimeString] = DateTimeOffset.MinValue;
                IsolatedStorageSettings.ApplicationSettings[ConfigHelper.UserIdString] = string.Empty;
                IsolatedStorageSettings.ApplicationSettings[ConfigHelper.IsValidSettingsString] = false;
            }
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }

            if (e.ExceptionObject.Message == "Exit")
            {
                return;
            }

            e.Handled = true;
            RootFrame.Dispatcher.BeginInvoke
            (
                () =>
                {
                    WebException ex = e.ExceptionObject as WebException;
                    MainPage mainPage = RootFrame.Content as MainPage;

                    if (ex != null && mainPage != null)
                    {
                        mainPage.RestorePageStateForException(ex);
                    }
                    else
                    {
                        CommonHelper.ShowErrorMessage(e.ExceptionObject.Message);
                        throw new Exception("Exit");
                    }
                }
            );
        }

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new TransitionFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;
            RootFrame.Navigating += RootFrame_Navigating;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        private void RootFrame_Navigating(object sender, NavigatingCancelEventArgs e)
        {
            //////////////////////////////
            // Add setting for emulator.
            //ConfigHelper.AccessToken = "6583fb674053dbce6f35934bde0a5666";
            //ConfigHelper.AccessTokenExpiredTime = DateTimeOffset.Now.AddDays(1);
            //ConfigHelper.UserId = "1347942210";
            //////////////////////////////

            RootFrame.Navigating -= RootFrame_Navigating;

            if (ConfigHelper.IsValidSettings == false || ConfigHelper.AccessTokenExpiredTime < DateTimeOffset.Now)
            {
                e.Cancel = true;
                RootFrame.Dispatcher.BeginInvoke(() => RootFrame.Navigate(new Uri("/Authentication.xaml", UriKind.Relative)));
            }
        }

        #endregion
    }
}